Dell Latitude 5400 BIOS image labelled lock, packed in an 11.4 MB RAR archive. The name suggests a password-locked original dump, useful as a reference or as the starting point for unlocking work rather than for direct reflashing. Such dumps are read from the SPI flash with a programmer such as a CH341A or similar, and later edited or compared with clean images. Before writing anything back, keep a copy of the chip's current content and check that the file size corresponds to the flash chip installed on the board.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosfilebins. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →